The Most Ancient Spiral Galaxy: A 2.6-Gyr-old Disk with a Tranquil Velocity Field
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Yuan, Tiantian; Richard, Johan; Gupta, Anshu; Federrath, Christoph; Sharma, Soniya; Groves, Brent; Kewley, Lisa; Cen, R; Birnboim, Yuval; Fisher, David B
Description
We report an integral-field spectroscopic (IFS) observation of a gravitationally lensed spiral galaxy A1689B11 at redshift z = 2.54. It is the most ancient spiral galaxy discovered to date and the second kinematically confirmed spiral at . Thanks to gravitational lensing, this is also by far the deepest IFS observation with the highest spatial resolution (∼400 pc) on a spiral galaxy at a cosmic time when the Hubble sequence is about to emerge. After correcting for a lensing magnification of 7.2...[Show more]
dc.contributor.author | Yuan, Tiantian | |
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dc.contributor.author | Richard, Johan | |
dc.contributor.author | Gupta, Anshu | |
dc.contributor.author | Federrath, Christoph | |
dc.contributor.author | Sharma, Soniya | |
dc.contributor.author | Groves, Brent | |
dc.contributor.author | Kewley, Lisa | |
dc.contributor.author | Cen, R | |
dc.contributor.author | Birnboim, Yuval | |
dc.contributor.author | Fisher, David B | |
dc.date.accessioned | 2021-09-30T01:52:57Z | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/1885/249079 | |
dc.description.abstract | We report an integral-field spectroscopic (IFS) observation of a gravitationally lensed spiral galaxy A1689B11 at redshift z = 2.54. It is the most ancient spiral galaxy discovered to date and the second kinematically confirmed spiral at . Thanks to gravitational lensing, this is also by far the deepest IFS observation with the highest spatial resolution (∼400 pc) on a spiral galaxy at a cosmic time when the Hubble sequence is about to emerge. After correcting for a lensing magnification of 7.2 ± 0.8, this primitive spiral disk has an intrinsic star formation rate of 22 ± 2 M o yr-1, a stellar mass of M o, and a half-light radius of , typical of a main-sequence star-forming galaxy at . However, the Hα kinematics show a surprisingly tranquil velocity field with an ordered rotation ( km s-1) and uniformly small velocity dispersions ( km s-1 and km s-1). The low gas velocity dispersion is similar to local spiral galaxies and is consistent with the classic density wave theory where spiral arms form in dynamically cold and thin disks. We speculate that A1689B11 belongs to a population of rare spiral galaxies at that mark the formation epoch of thin disks. Future observations with the James Webb Space Telescope will greatly increase the sample of these rare galaxies and unveil the earliest onset of spiral arms. | |
dc.description.sponsorship | This research was conducted by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. T.Y. acknowledges the support from the ASTRO 3D fellowship. B.G. gratefully acknowledges the support of the Australian Research Council as the recipient of a Future Fellowship (FT140101202). C.F. acknowledges funding provided by the ARC Discovery Projects (grants DP150104329 and DP170100603). D.B.F. acknowledges support from ARC Future Fellowship grant (FT170100376). J.R. acknowledges support from the ERC starting grant 336736-CALENDS. L.K. gratefully acknowledges support from an Australian Research Council (ARC) Laureate Fellowship (FL150100113). R.C. acknowledges grants NNX12AF91G and AST15-15389. Y.B. acknowledges ISF grant 1059/14 | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | IOP Publishing | |
dc.rights | © 2017. The American Astronomical Society. | |
dc.source | The Astrophysical Journal | |
dc.subject | cosmology: observations | |
dc.subject | galaxies: evolution | |
dc.subject | galaxies: formation | |
dc.subject | galaxies: high-redshift | |
dc.subject | galaxies: spiral | |
dc.title | The Most Ancient Spiral Galaxy: A 2.6-Gyr-old Disk with a Tranquil Velocity Field | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 850 | |
dc.date.issued | 2017 | |
local.identifier.absfor | 020103 - Cosmology and Extragalactic Astronomy | |
local.identifier.ariespublication | a383154xPUB9846 | |
local.publisher.url | http://iopscience.iop.org/0004-637X | |
local.type.status | Accepted Version | |
local.contributor.affiliation | Yuan, TianTian, College of Science, ANU | |
local.contributor.affiliation | Richard, Johan, Centre de Recherche Astrophysique de Lyon | |
local.contributor.affiliation | Gupta, Anshu, College of Science, ANU | |
local.contributor.affiliation | Federrath, Christoph, College of Science, ANU | |
local.contributor.affiliation | Sharma, Soniya, College of Science, ANU | |
local.contributor.affiliation | Groves, Brent Allan, College of Science, ANU | |
local.contributor.affiliation | Kewley, Lisa, College of Science, ANU | |
local.contributor.affiliation | Cen, R, Princeton University | |
local.contributor.affiliation | Birnboim, Yuval, College of Science, ANU | |
local.contributor.affiliation | Fisher, David B, Swinburne University of Technology | |
dc.relation | http://purl.org/au-research/grants/arc/CE170100013 | |
dc.relation | http://purl.org/au-research/grants/arc/FT140101202 | |
dc.relation | http://purl.org/au-research/grants/arc/DP150104329 | |
dc.relation | http://purl.org/au-research/grants/arc/DP170100603 | |
dc.relation | http://purl.org/au-research/grants/arc/FT170100376 | |
dc.relation | http://purl.org/au-research/grants/arc/FL150100113 | |
local.bibliographicCitation.issue | 61 | |
local.bibliographicCitation.startpage | 1 | |
local.bibliographicCitation.lastpage | 18 | |
local.identifier.doi | 10.3847/1538-4357/aa951d | |
dc.date.updated | 2020-11-23T11:18:38Z | |
local.identifier.scopusID | 2-s2.0-85037710009 | |
dcterms.accessRights | Open Access | |
dc.provenance | https://v2.sherpa.ac.uk/id/publication/6401..."The Accepted Version can be archived in a Non-Commercial Institutional Repository. 12 months embargo" from SHERPA/RoMEO site (as at 30/09/2021). | |
Collections | ANU Research Publications |
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